Writing Equations

The total cost of Sally's phone bill last month was $120. She has to pay $57 for her phone line and unlimited minutes. Write an equation to find the number of texts Sally sent if each text costs $0.09.

• 0.09x - 57 = 120

• 120 + 57 = 0.09x

• 0.09x + 57 = 120

• 57x + 0.09 = 120

Sally has to pay $57 for her phone line and unlimited minutes. She also pays $0.09 for each text she sends. If her budget is $84, how many texts can Sally send?

• 933 texts

• 300 texts

• 1,566 texts

• 633 texts

John needs a plumber to make some fixes around his house. The plumber charges $45 to visit John's home. He also charges $15 per hour. John's final bill for the plumber was $112.50. Write an equations to determine the number of hours the plumber worked.

• 15x + 45 = 112.50

• 112.50 + 45 = 15x

• 15x - 45 = 112.50

• 45x + 15 = 112.50

John needs a plumber to make some fixes around his house. The plumber charges $45 to visit John's home. He also charges $15 per hour. If John has $135 to spend on the plumber, how many hours can he afford the plumber to work?

• 6 hours

• 12 hours

• 9 hours

• 3 hours

Sarah is renting a scooter for the day to explore downtown Chicago. Skyline Scooters charges $30 to rent the scooter plus $7.50 per hour. Sarah spent a total of $60 on her scooter tour. Write an equation to determine the number of hours Sarah spent on her tour.

• 60 - 7.5 = 30x

• 7.5x - 30 = 60

• 30x + 7.5 = 60

• 7.5x + 30 = 60

Sarah is renting a scooter for the day to explore downtown Chicago. Skyline Scooters charges $30 to rent the scooter plus $7.50 per hour. If Sarah has $90 to spend on her tour, how many hours can she explore downtown Chicago?

• 12 hours

• 8 hours

• 16 hours

• 4 hours